Compared with younger children and older adults, adolescent and young adult (AYA) patients with cancer receive more intensive end-of-life (EOL) care. We hypothesize that enhanced understanding of AYA preferences, increased engagement of these patients in decision-making, and improved communication of their preferences with family members and the medical team will lead to increased provision of goal-concordant care and decreased intensity of EOL care. In this study, we describe the development of a novel tool that quantifies the relative importance of numerous factors considered by AYA patients with cancer, their parents, and health care providers when choosing between treatment options.

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Purpose Adolescents and young adults (AYAs) with cancer report feeling ill-informed about their cancer treatment options. Tools are needed to inform AYAs about treatment choices and amplify the AYA's voice in medical decision-making. We developed MyPref, a conjoint-analysis based tool that quantifies AYA preferences for future cancer treatments. Methods We conducted a staged pilot study of MyPref utilizing an intervention mixed methods design. AYAs and their parent or trusted person (PTP) completed MyPref and received a summary report of their preferences for treatment-related factors. Participants later completed the Preparation for Decision Making Scale and MyPref Experience Questionnaire and engaged in semi-structured interviews. Oncologists reported on the perceived accuracy and utility of MyPref. We used a weaving technique for presenting mixed methods data. Results Fifteen AYAs with advanced cancer, 7 PTPs, and 12 providers participated in this pilot; 32 (94%) completed all study items. AYA/PTPs stated study participation was useful and believed MyPref allowed for improved understanding of treatment factors and consideration, organization, and visualization of preferences. All providers agreed that MyPref made them think about patient's preferences and 9 (75%) reported they planned to change their approach to discussions about preferences for future treatments. Conclusion MyPref is an objective way to estimate AYA and PTP preferences for future treatment characteristics. This novel tool may be a useful way to engage AYAs and PTPs in discussions around preferences for treatment and prepare AYAs for future decision-making. We are currently evaluating this tool longitudinally to determine the impact on actual treatment decisions.

Background: Adolescents and young adults (AYAs) with cancer receive high-intensity care and experience significant symptoms at the end of life. As novel cancer-directed therapies increase, AYAs with advanced cancer may face multiple treatment options, each with unique risk/benefit profiles. To augment the AYAs' voice in the decisionmaking process, we developed MyPref, an adaptive conjoint analysis-based tool. Procedure: We conducted a three-staged pilot study of MyPref utilizing an exploratory intervention mixed methods design. AYAs and their identified parent or trusted person (PTP) completed MyPref and received a summary of their preferences for nine treatment-related factors. Participants later engaged in semi-structured interviews to further explore their experience with MyPref. Responses to free text questions and interviews were analyzed using qualitative techniques. Results: Fifteen AYAs with advanced cancer and seven PTPs participated in the pilot. While most participants identified time until cancer grows, quality of life, and side effects to be the most important factors when considering a future treatment, preferences were highly varied. Notably, MyPref-calculated preferences differed from initial rank order, and participants indicated that calculated preferences were accurate in follow-up interviews. Conclusion: The MyPref-calculated preferences varied by individual and differed from initial rank ordering. Additionally, there was variability in how individuals defined and prioritized treatment-related factors. This novel tool may be a useful way to engage AYAs and their PTPs in discussions around preferences for treatment and prepare